Otherwise, using autoconf will fail if one does
not explicitly add -lstdc++ to LIBS. One example
is:

AC_ARG_WITH(ntl,
  [AS_HELP_STRING([--with-ntl=<path>],
                  [prefix of NTL installation. e.g. /usr/local or /usr])],
  [],
  [AC_CHECK_LIB([ntl], [_ntl_gmul],[ ],
    AC_MSG_ERROR([NTL Library not found.
    Maybe you want to call configure with the --with-ntl=<path> option?
    This tells configure where to find the NTL library and headers.
    e.g. --with-ntl=/usr/local or --with-ntl=/usr]),[${GMP_LIBS}])]
)

that fails with several missing libstdc++
symbols, example:

configure:16055: gcc -o conftest -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4  -m64 -mtune=generic  -Wl,-z,relro  conftest.c -lntl  -lgmp  >&5
/usr/lib/gcc/x86_64-redhat-linux/4.7.2/../../../../lib64/libntl.so: undefined reference to `std::ostream& std::ostream::_M_insert<unsigned long>(unsigned long)'
/usr/lib/gcc/x86_64-redhat-linux/4.7.2/../../../../lib64/libntl.so: undefined reference to `std::basic_ios<char, std::char_traits<char> >::init(std::basic_streambuf<char, std::char_traits<char> >*)'
[...]
/usr/lib/gcc/x86_64-redhat-linux/4.7.2/../../../../lib64/libntl.so: undefined reference to `__cxa_guard_acquire'
collect2: error: ld returned 1 exit status
configure:16055: $? = 1

This problem is not rawhide specific, but I am adding
a patch to a package to set LIBS in configure.ac; it
already does autoreconf for another reason...